<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<iframe src="left_nav.html" style="border: 0px ;height: 20%;float: left;"></iframe>
<iframe src="anchor_with_css.html" style="border: 0;width: 80% ;height: 1000px;float: right"></iframe>

</body>
</html>